Rectangular offset strip fin heat transfer pipe and uses thereof

Abstract

The invention provides a heat transfer tube with rectangular staggered fins and application thereof. The inventive heat transfer tube comprises a tube body and a plurality of rectangular staggered fins fixed on the tube body. The outer edge of the lee side of rectangular staggered fin is flat, and the other three outer edges are staggered in cross section along thickness direction and respectively provided with 5-8 sphenoid narrow grooves. The inventive heat transfer tube with the rectangular staggered fins can be used for heat and mass exchange equipment in gas-solid sublimation process and gas-liquid condensation process. The invention has simple structure and low manufacturing cost, can improve local turbulence, and can remarkably reinforce gas lateral heat exchange and phase-change heat transfer and mass transfer processes.

Description

technical field [0001] The invention relates to the technical field of heat and mass exchange, in particular to a rectangular staggered fin heat transfer tube and its application. Background technique [0002] my country's industrial energy consumption accounts for about 50% of the total energy consumption of the whole society, and the energy consumption level of unit products in many energy-intensive processes is 30-90% higher than the international advanced level, while the energy consumption of heat-mass exchange heat equipment accounts for the total industrial energy consumption. Therefore, strengthening the energy conversion efficiency of thermal devices has become one of the key technologies for energy saving and emission reduction. At present, the method of strengthening heat transfer tubes is used at home and abroad to improve the heat transfer efficiency of heat and mass exchange equipment. If the finned tube is used instead of the light tube, it can not only increa...

AI Technical Summary

Problems solved by technology

Among them, ordinary circular fins and ordinary rectangular fins are radial continuous fins, which mainly play the role of expanding the heat transfer area in the heat transfer enhancement. The disadvantage is that they cannot fully enhance the local turbulent flow to achieve heat transfer enhancement. The enhanced heat transfer is not good, and the heat transfer enhancement effect of the effective heat transfer area cannot be fully utilized; the slotted fins, triangular hole fins, fan-shaped fins, etc. are biased towards the staggered fins, which expand the heat transfer area and promote to a certain extent. Local turbulence is achieved, but it is still not fully utilized to enhance local turbulence to achieve heat transfer enhancement

[0003] At present, the circumferential three-dimensional fins proposed in various patents can cause periodic fractures of the fluid boundary layer on the radial fins during convective heat exchange, which fully promotes local turbulence. However, due to process limitations, the height of the fins is not large. Therefore, the effect of expanding the effective heat transfer area is limited, and it is processed and manufactured by rolling and extrusion, and the cost is relatively high

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